1172791 has 4 divisors (see below), whose sum is σ = 1197792. Its totient is φ = 1147792.

The previous prime is 1172783. The next prime is 1172797. The reversal of 1172791 is 1972711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1172791 - 2³ = 1172783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12430 + ... + 12523.

It is an arithmetic number, because the mean of its divisors is an integer number (299448).

2^1172791 is an apocalyptic number.

1172791 is a deficient number, since it is larger than the sum of its proper divisors (25001).

1172791 is an equidigital number, since it uses as much as digits as its factorization.

1172791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25000.

The product of its digits is 882, while the sum is 28.

The square root of 1172791 is about 1082.9547543642. The cubic root of 1172791 is about 105.4565456733.

The spelling of 1172791 in words is "one million, one hundred seventy-two thousand, seven hundred ninety-one".